Nut lock



13526596` s. H. cAMPB't-:LL:

' .NUT mex med Maron 1, 192g v lMay 3, 1927 l o l I v l y lll" 4 A 1 e. l l ,l .rl l l l l lPatented May 3, v192,7..

paaren stare Ferca., I

STERLING H. CAMPBELL, or sr. Louis, Mssoum, AssIGNon To RAILWAY DEVICESy i COMPANY, or sr. LoUIs, MIssoUItI, A CORPORATION or MISSOURI.

NUT LOCK.

Application sled March 1, 1926. serial No. 91,298.

` of additional parts is avoided and the bolt and nut may be reused.- I am aware that bolts have been heretofore provided with slots in their ends to admit a wedgeshaped tool to expandthe end of the bolt. I have found. however, that under many conditions there is a tendency to tilt the nut.y which tiltingr action draws the parts of the bolt to- `@ether at the' endclosing the slot and rendering the device inoperative.A The object of the present invention is to provide the bolt with ymeans giving access tothe expanding' slot after it has beenr closed by the` action of the bolt.

In theaccompanying;` drawings, which illustrate a nut locking device made in accordance with my invention, together with certain modifications of the bolt used therein, Figure 1 is a vertical section showing the nut partially drawn to position; Figure 2 is a similar section. showing the nut completely drawn up and the end of theboltexpanded; Figure 3 is a detail side and end view 'of the bolt: and Figures 4. 5, 6 and 7 are views similar to Figure 3 but showing several modifications of the bolt.

Referring: first to Figures 1.2 and 3, the

bolt indicated at 10 is provided with the-v usual head 11 and passes through parts 12 and 13 which may be respectively a floor board and a clip to be secured thereto. The vclip 13 is provided with a spur 14C to preventits rotation. This spur causes the clip to lie at an angleto the axis 4of the bolt and this tends to tip the nut y15 as it is drawnup and would thus render the eirpanding slot 16 useless if means were not provided to give access to it. In my preferred form this means consists of va secondary slot 17 with inclined side formed at the outer end ofthe expanding slot 16. This, as is clearly shownA in Figure 1, provides access to the expanding slot so that the end of the bolt may be spread, as shown in Figure 2, byv a suitable wedge-.shaped tool.`

In Figure 4 I have shown al modificationy in which one side of thefbifurcated end `of the bolt is made shorter than the othery so as to have a flat face 18 on the long side. It

will be evident that a suitable tool may be placed against the face and the long end hammered over to openthe end of the eX- panding slot.

The Sie@ 2o in the @ad of the form @ebelt shown in Figure 5 is double V-shaped lin i form the inclined faces opening laterallyj The expanding tool may be insertedgfrom either side of the bolt in this form,` the eX-v i panding yslot 16 being formed between the apices of thetwo parts formed bythe doubleV I' V -slot.

In the form shown inFiJureG the ends f of both sides'of the bolt are beveled to form y l inclined faces 21. which faces are inclined in opposite directions so that either side of Y the bolt may be hammeredr over to open the slot. by placing` a tool against oneof the two flatl side faces 22 thus exposed.`

In the form shown inFigure 7 acentral opening 23 is formed in the end of the bolt so that a conical tool may be inserted from the endvto open up the' expanding slot 16. j

Having'fully described my invention, what I claim as new and desire tosecure by Let vters Patent of the vUnited States is:

1. In a device of the classl described, the` combination with a threadedl bolt1 ,of a -cooperating; nut. said bolthavine' a slot formed in its end` said slotvhaving a lateral opening with converging' sides for.v the `insertion of a tool to expand the bolt. f

`2.`I n a device of the` class described, thev 'l combination with a threaded bolt. of a .cooperating? nut. said bolt'having a slot formed in its end. said slot being narrowest. alone ine? inclined tool ways are provided.

" In testimony whereof. I hereunto afiix'my signature,l this 26th dayoflFebruary,y 1926.

STERLING H, CAMPBELL.

the axis of the bolt and expanding to each" i side thereof whereby a pair of laterallyopen-` 

